Folding "belt" into specific length with specific area

[Anonymous]

Hello guys,

I need to test print T5 belt with specific height and length.

Segment of T5 belt is 5mm long, need 259 teeths, which is 1295mm long.

I would like to printed it out from TPU material on FDM printer which have working dimensions 265*265mm.

So I need to somehow fold the belt into some i/regullar shape (something like in f3d document) but with specific length which fits into working space of printer. I'm little bit stuck, how to do it.

Can you please point me on some workflow?

Thanks.

[TheCADWhisperer]

See Attached.

Consider though, were is the length of belt measured?  At Pitch? At outside?  At Inside?

Is this a single sided belt or double sided?

Is 259 teeth a standard length that you could purchase off-the-shelf?

I would normally purchase off-the-shelf, so I had to do a little bit of research on the geometry.

What reference are you using for the geometry?

[Anonymous]

Hello Cadwhisperer,

thanks for your reply.

1st of all, I can't find the Synchronous Belt generator in Fusion - where is it suppose to be? I can't find it in Addons, neither in APP store.

2nd - 259 teeths is not very common and it's hard to purchase (at least mmy customer said this) and he needs specific height to pulley, so 3D printing cames up.

3rd - it's not necessarily that length of belt needs to be 1295mm, it could be little more - there are some tensioners.

Thanks.

[TheCADWhisperer]

1. The synchronous belt generator is in Autodesk Inventor Professional, not in Autodesk Fusion 360.

2. Do you have a link to source where it is possible to purchase?

3. Do you have a link to information on the geometry of the teeth?  I found information in Autodesk Inventor Professional, but I would prefer that we used the same on-line resource for information. (How were you going to design the teeth for the belt?)

BTW - I used trial-and-error to get the length.  It would be much easier to set a parametric formula if modeled as straight sections with 180° bends, but I was trying to keep the bend radius as large as possible.  I assume that is why you modeled as you did.  Now that I now the belt nomenclature for tooth profile and belt length centerline, I would have to repeat the process to create correct belt within printable area of table.

[Anonymous]

Ah, so that's the reason a I couldn't find it 🙂

No, unfortunately I have not.

Geometry of the T5 is standardized thing (if you zoom up my f3d document, there is sketch of it), but you can also find it in LINK or HERE 

[TheCADWhisperer]

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@Anonymous wrote:

...(if you zoom up my f3d document, there is sketch of it)...

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Sketch is undefined?

Where are your dimensions???

[laughingcreek]

FWIW (not much) I think using a 3d printed timing belt is asking for trouble.  There's a lot more to those things than just their geometry (which is plenty by itself).  Less heartache down the road to change programming and/or pully teeth count so you can get an off the shelf part.